Question

Which equation is the inverse of y = 7x2 – 10?

Answer 1

It's B

Explanation:

On Edge 2021

Answer 2

we have

`y=7x^(2)-10`

To find the inverse

Step 1

Exchanges the variables, x for y and y for x

`x=7y^(2)-10`

Step 2

Isolate the variable y

`x=7y^(2)-10`

`7y^(2)=x+10`

`y^(2)= (x+10)/(7)`

Square Root both sides

`y=(+/-)\sqrt{(x+10)/(7)}`

Step 3

Let

`f(x)^(-1)=y`

so

`f(x)^(-1)=(+/-)\sqrt{(x+10)/(7)}`

therefore

the answer is

The inverse is

`f(x)^(-1)=(+/-)\sqrt{(x+10)/(7)}`